Micrhystridium picorricum Appendix A
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"picorricum" Cramer, 1964, p.303, pl.11, figs.1–3; text-fig.24. Holotype: Cramer, 1964, pl.11, fig.2. Originally Micrhystridium, subsequently Multiplicisphaeridium (Appendix A), thirdly Hystrichosphaeridium (combination not validly published). Taxonomic senior synonym: Baltisphaeridium (now Multiplicisphaeridium) cladum Downie, 1963, an acritarch species, according to Colbath (1979, p.20–21). Age: Devonian (middle Siegenian–Emsian).
Parent: Micrhystridium_Appendix A